Cutting-tool.



WASHINGTON MCGORMICK, OF HILLYARD, WASHINGTON.

CUTTING-TOOL.

Specification of Letters Patent.

Patented July 16,v 1907.

Application led March 25,1907. Serial N0. 364,353.

To all 'whoml it may concern:

Be it known that I, WASHINGTON MCCORMICK, a citizen of the United States7 residing at Hillyard, in the .county oi Spokane and State of Washington, have invented a new and useful Cutting-Tool, of which the following is a speciication.

This invention relates to cutting tools and is more particularly designed for cutting stay bolts such as used in locomotive boilers and the like.

The object oi the invention istoprovide an efficient device of this character which is very compact in construction and can be easily manipulated.

A still further object is to provide a tool having an adjustable gage plate whereby a tool can be held at a proper distance within the stay bolt to be cut.

A still further object is to provide simple means whereby the cutter of the tool can be quickly thrown into or out ol' operative position. Heretofore in devices oi this character pawls and ratchets have been employed for shitting the cutters into or out of operative position but such mechanism has been found to complicate the construction.

One oi the objects oi the invention is to provide simplified means for actuating the cutting tool7 said means being limited in its movement so that the cutter will be held positively either ully retracted out of operative position or projected to its 4greatest extent into operative position.

With these and other objects vin view the invention consists of certain novel features of construction and combinations of parts which will be hereinafter more ully described and pointed out in the claims.

l'n the accompanying drawings is shown the preferred form of the invention.

In said. drawings: Figure l is an elevation of the tool, the same being shown in position within a stay boltJ said bolt being shown inposition within a portion of a boiler; Fig. 2 is a longitudinal section through the tool; Fig. 3 is a transverse section therethrough on line apr, Fig. 2; and Fig. 4 is a section on line y-y, `Fig. 2.

Referring to the Iigures by characters oi reference, 1 is a cylindrical sleeve having an eccentric bore 2 extending longitudinally therethrough, and within this bore is rotatably mounted a core 3V also provided with an eccentric bore 4. The core 3 has one end thereof projecting beyond the sleeve 1 and formed with a radially extending arm 5 constituting a handle. Oppositely extending shoulders are formed upon the projecting portion oi the core and are designed to limit the movement of a lug 7 which projects from the end ol the sleeve 1. The lug and shoulders are so arranged that when the lug bears upon one oi the shoulders the bore 4 is located at its greatest distance from the longitudinal center of the sleeve and when the lug rests uponthe other shoulder the longitudinal center oi the bore 4 is disposed at the center of the sleeve l.

Rotatably mounted within the bore 4 is a spindle 8 having a rotary cutter 9 at one end thereof, the periphery of which is preferably formed with teeth 10 which are wedge-shaped in cross section. The diameter of this cutter is equal to or less than the diameter oi the sleeve 1 and it is obvious that when the spindle S is disposedl alongthe longitudinal center of the sleeve the cutter will lie within the periphery oi the end oi said sleeve. That end oi the spindle'iarthest removed from the cutter 9 is angular in cross section, as shown at 1l. to facilitate the connection with the drive shaft oi' a motor and a sleeve 12 is fastened to the spindle in any preierred manner,'as by means oi a set screw 13 to hold the parts assembled.V v

An annular flange 14 is formed about the center of' the sleeve 1 and is provided at diametrically opposite points with a pair o angular recesses 15 in which are slidably mounted longitudinally slotted arms 16 connected at one end by a head 17 which loosely embraces the sleeve 1. Set screws 18 extend through the slotted arms and into the ilange 14 and are designed to hold the head 17 in any position to which it may be adjusted upon the sleeve 1.

In Fig. l has been shown boiler plates 19 connected by a stay bolt 20. When it is desired to cut the stay bolt from one o the boiler plates a recess 21 is drilled into one end ofthe bolt and into this recess is inserted the cutter 9 o the tool constituting the present invention. This cutter is normally disposed with its center in alinement with the longitudinal axis oi sleeve 1 and it is therefore apparent that said sleeve canbe readily inserted into the bore 21. The gage formed by head 17 and arms 16 is adjusted so as to Contact with the end of the stay bolt when the cutter is located at the proper point within the stay bolt. After theparts have been spaced in this manner the arm 5 is swung laterally so as to rotate the core 3 within the eccentric bore 2. This will swing the spindle 8 away from the longitudinal center of the sleeve and the cutter will therefore be projected beyond the periphery oi the sleeve and into contact with the stay bolt. The spindlev 8 is designed to be driven by a suitable motor and while the cutter is rotating rapidly therewith it can be gradually pressed against the stay bolt by pressing against the arm 5. When it is desired to disengage the cutter from the stay bolt so as to permit the tool to be withdrawn it is merely necessary to throw the arm 5 in an opposite direction until it is stopped by the lug 7 which will occur when the cutter assumes a position with its center in alinement with the axis of vthe sleeve. Considerable importance is attached to'this feature inasmuch as it can be determined positively when the cutter has assumed such a position as to permit the withdrawal of the tool from the stay bolt. By providing the gage upon the sleeve the tool can be readily reet in the same position as that from which it may have been removed. By removing the retaining sleeve 12 the spindle 8 can be easily Withdrawn from the core 3 and said core can be slipped out of the sleeve l. Any one of the parts of the tool can therefore be readily renewed in'the event of Wear or breakage and all of the parts can be taken apart for the purpose of cleaning them.

Y hat is claimed is:

1. The combination with a sleeve having an eccentric llore, a core revoluhly mounted therein and having an eccentric bore, and a spindle revoluhly mounted within the core: of an arm extending laterally from the core and constituting a combined weight and handle, stop shoulders formed with the core and adjacent the arm, a projection upon the sleeve, either of said shoulders being disposed to contact with the projection to limit the movement of the core, said arm being disposed to hold either shoulder l inl Contact with the projection, and a cutter upon the spindle.

2. The combination with a sleeve having an eccentric borey a core revolubly mounted therein and having an eccentric bore, a spindle revolubly mounted Within the core, and a cutter upon the spindle, said sleeve having an annular ange formed with guide grooves; of a gage head surrounding and slidably mounted upon the sleeve, longitudinallyy slotted arms extending therefrom and mounted Within the guide'grooves, and means for clamp` ing the arms upon the flange and within. the grooves, said head and arms constituting a gage.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses.

WASHINGTON MCCORMICK. Witnesses H. C. HORN,

THOMAS R. RYAN. 

